call now 01785 254 597


CL7687 Chlorine Controller

CL7687 Chlorine Controller

The CL7687 Chlorine controller is designed for direct reading of free chlorine values in ppm or mg/L and can operate in many modes including automatic, measure or simulated modes.

The CL7687 is a panel mounted Chlorine Controller designed to work with either an Open Amperometric Chlorine Cell or our SZ283 Potentiostatic Chlorine Sensor, and when combined with our SZ283, it is designed to allow for measurement of Free Chlorine / Residual Chlorine, Chlorine Dioxide or Bromine.

Key Features

With IP65 protection the CL7687 offers some key features including an industry standard 4-20mA output, which allows for PID control or transmission of the measured values. During PID control through the analog output, the level of the actuation is displayed. The user can select an FM regulation (pulse frequency) or WM (pulse width) addressed to the assigned relay.

The CL7687 has an easy installation process rating and is suitable for panel mounting. For wall mounting take a look at the CL6587, it also allows for other mounting options including DIN rail and handrail with the help optional accessories. It also has a large monochrome display that shows the chlorine measurement values and guides the user through set-up, configuration and normal operation using the dedicated keys to directly access zero and sensitivity calibration as well as initial configuration.

The CL7687 also has a dedicated relay to an external device to initiate self-cleaning. This function is fully programmable through the controllers’ software. The controller also uses a universal power supply from 85 to 264 Vac, 50/60 Hz, with low voltage option that allows to power the unit from 9 to 36 Vdc or from 12 to 24 Vac, 50/60 Hz.


There are many applications for the CL7687 chlorine controller including aquaculture, pharmaceutical, chemical industry, textile industry, drinking water, water treatment, swimming pools, food and beverage and many more with substances such as free chlorine, combined chlorine, total chlorine, chlorine dioxide, dissolved ozone, hydrogen peroxide and peracetic acid.

CL7687 Range

Chlorine Range
0 ÷ 200.0 ppb / μg/l
0 ÷ 2.000 ppm / mg/l
0 ÷ 20.00 ppm / mg/l
0 ÷ 200.0 ppm / mg/l
0 ÷ 2000 ppm / mg/l
-10.0 ÷ 110.0 °C, 14.0 ÷ 230.0 °F

As a sophisticated Chlorine Controller, the CL7687 is capable of taking an input from a temperature sensor to provide automatic temperature compensation across a user-configurable range.

CL7687 Chlorine Controller Specifications

  • Specifications


    Inputs: Potentiostatic sensors,  polarographic membraned sensors.

    Zero: ± 20 %, ± 5.0 °C, ± 9 °F

    Sensitivity: 12.5 ÷ 250 %

    Resolution: 1 digit

    Accuracy: 0.2 %

    Repeatability: 0.1 %

    Non-linearity0.1 %

    Dual Filter software: 0.4 ÷ 50.0 seconds for small and large variations

    Dual Analog output: 0-20 mA / 4-20 mA Rmax 600 Ω

    Dual set point HI/LO: ON/OFF - PID - PFM - PWM, SPST relays

    Hysteresis: 0 ÷ 10 %

    Delay: 0 ÷ 100.0 seconds

    Alarm: SPDT relay with delay 0 ÷ 100.0 seconds

    Cleaning Function: off / autoclean / manual, relay SPDT, repetition time 0.1 ÷ 100.0 hours, cleaning time 1.0 ÷ 60.0 seconds, holding time 0.0 ÷20.0 minutes.

    Power supply: 85 ÷ 264 Vac - 50/60 Hz. 9 ÷ 36 Vdc, 12 ÷ 24 Vac (option 091.42x),

    Weight: 1360 g

    Dimensions: 98x98x104 mm, 90x90x95 mm panel cutout

  • Features


    • Easy installation and setup, the CL7687 has an IP65 protection rating and a with a display and keypad to guide you easily through the set up process and is suitable for wall mounting, DIN rail and handrail with optional accessories.
    • Compatible with any amperometric sensor.
    • Can operate in automatic, measure or simulated modes to facilitate start-up or maintenance.
    • PID control through analog output.
    • Can set two filters in order to obtain a stable reading and a faster response to measurement variations.
  • Data Sheets

    Data Sheets


More Information